SiAU18-715 Troubleshooting for Outdoor Unit
Troubleshooting 393
7.31 Malfunction of Transmission between Main and Sub
Remote Controllers
Remote
Controller
Display
U8
Applicable
Models
AII indoor unit models
Method of
Malfunction
Detection
In case of controlling with 2-remote controller, check the system using microcomputer if signal
transmission between indoor unit and remote controller (main and sub) is normal.
Malfunction
Decision
Conditions
Normal transmission does not continue for specified period.
Supposed
Causes
Malfunction of transmission between main and sub remote controller
Connection between sub remote controllers
Defect of remote controller PCB
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Using 2-remote
controllers control.
SS1 of both
remote controllers is set
to "SUB."
SS1 of
remote controller PC
boards is set to
"MAIN."
Set SS1 to "MAIN"; the
power supply off once and
then back on.
Set one remote controller
to "MAIN"; the power
supply off once and then
back on.
(Q0580)
NO NO
Turn the power off and then
back on. If a malfunction
occurs, replace the remote
controller PC board.
NO
YES
YES
YES
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